Is it an invisible ellipse ... I can't see it
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There is no ellipse shown below so it is not possible to answer the precise question. But if a is the length of its semi-major axis and b be the length of its semi-minor axis, then
e = sqrt(1 - b2/a2).
the eccentricity will increase.
The degree by which any ellipse departs from a circle is called its "eccentricity".
stupid old comet encke doesn't have any eccentricity at all!
That is precisely the scientific term: "ellipse".
true